The Sensex opened with a bang at 15,452 - up 144 points from its previous close on the back of positive cues from the world markets. Fresh buying in morning trades saw the index rally to a high of 15,542.However, profit taking at higher levels saw the index pare gains as the day progressed. Negative signals from the overseas markets, weak opening for the European markets coupled with a steep fall in Dow futures, led to some nervousness in our markets. The selling pressure was so intense that the Sensex tumbled all the way into negative zone to a low of 15,062 - down 390 points from the day's high. The Sensex finally ended with a loss of 208 points at 15,100.